Mehmed Çelebi Efendi—known as Yirmisekiz Mehmed Çelebi—was an Ottoman diplomat and statesman, born in Edirne around 1670. He held significant administrative and financial positions within the Ottoman Empire and participated in the negotiations for the Treaty of Passarowitz in 1718. In 1720, during the reign of Sultan Ahmed III, he was appointed as ambassador to France; he became well-known for documenting his observations and impressions of French life and civilization. He passed away in Nicosia, Cyprus, in 1731.